Exploring the roles of zero-valent iron in two-stage food waste anaerobic digestion.

This research investigated the roles of zero-valent iron (ZVI) in a two-stage food waste digestion process. ZVI was added separately to hydrolytic-acidogenic (HA) and methanogenic (MG) stages to understand its impacts on FW hydrolysis-acidification, methanogenesis and bioenergy recovery efficiency. Results showed that ZVI effectively enhanced the overall performance of digestion as compared with the controls without ZVI.

Enhancement of hydrogen production using untreated inoculum in two-stage food waste digestion.

This research investigated the possibility to enhance H production using untreated inoculum in a two-stage hydrogen-methane process from food waste. Batch experiments were conducted to evaluate the H production efficiency at different F/M ratios (ranging from 1:1 to 64:1). The results showed that when a proper F/M ratio was selected, significant H production was feasible to be achieved even inoculated with untreated anaerobic sludge.

HS adsorption by municipal solid waste incineration (MSWI) fly ash with heavy metals immobilization.

As a byproduct of municipal solid waste incineration (MSWI) plant, fly ash is becoming a challenge for waste management in recent years. In this study, MSWI fly ash (FA) was evaluated for the potential capacity of odorous gas HS removal. Results showed that fly ash demonstrated longer breakthrough time and higher HS capacities than coal fly ash and sandy soil, due to its high content of alkali oxides of metals including heavy metals.